Magnetic field-enhanced water splitting enabled by bifunctional molybdenum-doped nickel sulfide on nickel foam

Yuanyuan Zhang; Mengxin Chen; Ping Guo; Yunchen Du; Bo Song; Xianjie Wang; Zaixing Jiang; Ping Xu

doi:10.1002/cey2.351

Magnetic field-enhanced water splitting enabled by bifunctional molybdenum-doped nickel sulfide on nickel foam

Yuanyuan Zhang
, Mengxin Chen
, Ping Guo
, Yunchen Du
, Bo Song
, Xianjie Wang
, Zaixing Jiang
, Ping Xu^*

^*Corresponding author for this work

School of Chemistry and Chemical Engineering, Harbin Institute of Technology
School of Physics, Harbin Institute of Technology

Research output: Contribution to journal › Article › peer-review

34 Scopus citations

Abstract

Herein, we report bifunctional molybdenum-doped nickel sulfide on nickel foam (Mo-NiS_x/NF) for magnetic field-enhanced overall water splitting under alkaline conditions. Proper doping of Mo can lead to optimization of the electronic structure of NiS_x, which accelerates the dissociation of H₂O and the adsorption of OH⁻ in the hydrogen evolution reaction (HER) and the oxygen evolution reaction (OER) processes, respectively. In addition, the magnetically active Mo-NiS_x/NF can further enhance the HER and OER activity under an applied magnetic field due to the magnetoresistance effect and the ferromagnetic (FM) exchange-field penetration effect. As a result, Mo-NiS_x/NF requires low overpotentials of 307 mV at 50 mA cm⁻² (for OER) and 136 mV at 10 mA cm⁻² (for HER) under a magnetic field of 10000 G. Furthermore, the electrolytic cell constructed by the bifunctional Mo-NiS_x/NFs as both the cathode and the anode shows a low cell voltage of 1.594 V at 10 mA cm⁻² with optimal stability over 60 h under the magnetic field. Simultaneous enhancement of the HER and OER processes by an external magnetic field through rational design of electrocatalysts might be promising for overall water splitting applications.

Original language	English
Article number	e351
Journal	Carbon Energy
Volume	5
Issue number	10
DOIs	https://doi.org/10.1002/cey2.351
State	Published - Oct 2023
Externally published	Yes

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This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 7 Affordable and Clean Energy

Keywords

FM exchange-field penetration effect
electron density modulation
magnetic field
magnetoresistance effect
water splitting

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10.1002/cey2.351

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title = "Magnetic field-enhanced water splitting enabled by bifunctional molybdenum-doped nickel sulfide on nickel foam",

abstract = "Herein, we report bifunctional molybdenum-doped nickel sulfide on nickel foam (Mo-NiSx/NF) for magnetic field-enhanced overall water splitting under alkaline conditions. Proper doping of Mo can lead to optimization of the electronic structure of NiSx, which accelerates the dissociation of H2O and the adsorption of OH− in the hydrogen evolution reaction (HER) and the oxygen evolution reaction (OER) processes, respectively. In addition, the magnetically active Mo-NiSx/NF can further enhance the HER and OER activity under an applied magnetic field due to the magnetoresistance effect and the ferromagnetic (FM) exchange-field penetration effect. As a result, Mo-NiSx/NF requires low overpotentials of 307 mV at 50 mA cm−2 (for OER) and 136 mV at 10 mA cm−2 (for HER) under a magnetic field of 10000 G. Furthermore, the electrolytic cell constructed by the bifunctional Mo-NiSx/NFs as both the cathode and the anode shows a low cell voltage of 1.594 V at 10 mA cm−2 with optimal stability over 60 h under the magnetic field. Simultaneous enhancement of the HER and OER processes by an external magnetic field through rational design of electrocatalysts might be promising for overall water splitting applications.",

keywords = "FM exchange-field penetration effect, electron density modulation, magnetic field, magnetoresistance effect, water splitting",

author = "Yuanyuan Zhang and Mengxin Chen and Ping Guo and Yunchen Du and Bo Song and Xianjie Wang and Zaixing Jiang and Ping Xu",

note = "Publisher Copyright: {\textcopyright} 2023 The Authors. Carbon Energy published by Wenzhou University and John Wiley \& Sons Australia, Ltd.",

year = "2023",

month = oct,

doi = "10.1002/cey2.351",

language = "英语",

volume = "5",

journal = "Carbon Energy",

issn = "2637-9368",

publisher = "John Wiley \& Sons Inc.",

number = "10",

}

TY - JOUR

T1 - Magnetic field-enhanced water splitting enabled by bifunctional molybdenum-doped nickel sulfide on nickel foam

AU - Zhang, Yuanyuan

AU - Chen, Mengxin

AU - Guo, Ping

AU - Du, Yunchen

AU - Song, Bo

AU - Wang, Xianjie

AU - Jiang, Zaixing

AU - Xu, Ping

PY - 2023/10

Y1 - 2023/10

N2 - Herein, we report bifunctional molybdenum-doped nickel sulfide on nickel foam (Mo-NiSx/NF) for magnetic field-enhanced overall water splitting under alkaline conditions. Proper doping of Mo can lead to optimization of the electronic structure of NiSx, which accelerates the dissociation of H2O and the adsorption of OH− in the hydrogen evolution reaction (HER) and the oxygen evolution reaction (OER) processes, respectively. In addition, the magnetically active Mo-NiSx/NF can further enhance the HER and OER activity under an applied magnetic field due to the magnetoresistance effect and the ferromagnetic (FM) exchange-field penetration effect. As a result, Mo-NiSx/NF requires low overpotentials of 307 mV at 50 mA cm−2 (for OER) and 136 mV at 10 mA cm−2 (for HER) under a magnetic field of 10000 G. Furthermore, the electrolytic cell constructed by the bifunctional Mo-NiSx/NFs as both the cathode and the anode shows a low cell voltage of 1.594 V at 10 mA cm−2 with optimal stability over 60 h under the magnetic field. Simultaneous enhancement of the HER and OER processes by an external magnetic field through rational design of electrocatalysts might be promising for overall water splitting applications.

AB - Herein, we report bifunctional molybdenum-doped nickel sulfide on nickel foam (Mo-NiSx/NF) for magnetic field-enhanced overall water splitting under alkaline conditions. Proper doping of Mo can lead to optimization of the electronic structure of NiSx, which accelerates the dissociation of H2O and the adsorption of OH− in the hydrogen evolution reaction (HER) and the oxygen evolution reaction (OER) processes, respectively. In addition, the magnetically active Mo-NiSx/NF can further enhance the HER and OER activity under an applied magnetic field due to the magnetoresistance effect and the ferromagnetic (FM) exchange-field penetration effect. As a result, Mo-NiSx/NF requires low overpotentials of 307 mV at 50 mA cm−2 (for OER) and 136 mV at 10 mA cm−2 (for HER) under a magnetic field of 10000 G. Furthermore, the electrolytic cell constructed by the bifunctional Mo-NiSx/NFs as both the cathode and the anode shows a low cell voltage of 1.594 V at 10 mA cm−2 with optimal stability over 60 h under the magnetic field. Simultaneous enhancement of the HER and OER processes by an external magnetic field through rational design of electrocatalysts might be promising for overall water splitting applications.

KW - FM exchange-field penetration effect

KW - electron density modulation

KW - magnetic field

KW - magnetoresistance effect

KW - water splitting

UR - https://www.scopus.com/pages/publications/85150609167

U2 - 10.1002/cey2.351

DO - 10.1002/cey2.351

M3 - 文章

AN - SCOPUS:85150609167

SN - 2637-9368

VL - 5

JO - Carbon Energy

JF - Carbon Energy

IS - 10

M1 - e351

ER -

Magnetic field-enhanced water splitting enabled by bifunctional molybdenum-doped nickel sulfide on nickel foam

Abstract

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